Features:9 in 1 MULTIFUNCTIONAL AIR QUALITY MONITOR  New 2020 upgraded indoor air quality monitor that can accurately assesses multiple measures of air quality including concentrations of formaldehyde (HCHO), PM2.5, PM1.0, PM10, HCHO, TVOC, temperature, humidity, AQI, Date/Time. It's very necessary for you to know the air quality of your living place   PORTABLE AIR DETECTOR Spot check indoor air quality anywhere or leave device on for continuous monitoring ,This easy-to-carry air quality detector can help monitor air quality at home, kitchen, bedroom, office, school, car, hotel, travel, campingetc...especially in which has baby,child and pregnant woman.   EASY OPEARATION This air monitor is easy to operate with just pressing the functional button, Updated user manual is very simple and easy to understand. The intelligent air tester can monitor the variety of the environment in a period your care about,You can take it anywhere to monitor air quality. At the same time, you can set a standard value of formaldehyde. If the density is higher than standard value, the device will alarm.   PORTABLE & USB RECHARGEABLE BATTERY Its easy to carry the intelligent air quality monitor that can help us detect the gas air pollution in household kitchen bedroom office school car, hotel, travel, camping, party etc...especially in which has baby,child and pregnant woman. Built with 1000 mAn rechargeable battery and packaged with one USB cable, the standby time can last for 8-12 hours   WHAT'S YOU GETIndoor air quality monitor made of ABS material, good feeling, non-toxic, eco-friendly and durable to use. Package Included: 1× Air quality tester, 1× USB cable, 1× User manual.   Specifications:Continuous work time:300min   Battery:1000mAh polymer lithium battery   Input voltage:5.0V/1000mA   Charging temp:-10-45   FormaldehydeTest object range:0-1.999mg/m3   Test tech:semiconductor sensor   Sample type:ciffusion type   Concentration unit:mg/m3   TVOC Test object:TVOC   Test range:0.000-9.999mg/m3   Test tech:semiconductor sensor   Sample type:ciffusion type   Concentration unit:mg/m3   Test time:5 min PM2.5/PM1.0/PM10 test   Test principle:laser light scattering   Test particle population:2.5um,1.0um,10um   Test particle mass:PM2.5,PM10   Sample time:3 sec   Test method:concentration(per liter)   Test range:0-999ug/m3   Use environment Air pressure:86Kpa-106Kpa   Relative humidity:20%-85%   Test temp:-10-45   Storage temp:-20-50   Package Included:1x Air Quality Monitor Tester   1x USB Cable   1x User Manual